Aba of Kashkar was a Christian priest who lived during the fourth century. He is recognized as a martyr for his faith within the Sasanian Empire, specifically in the region of Kashkar. Alongside several companions, including Saints Abda and Abdjesus, he faced persecution during a period of intense religious conflict. His death occurred during the Forty-Year Persecution, a time when the ruling authorities sought to establish Mazdaism as the official state religion and viewed Christians as potential Roman allies.